Leonidas g



(No Model.)

L. G. WOOLLEY.

ELECTRIC LAMP.

No. 319,539. PatentedJune 9, 1885.

n. PETERS, Phum-mm n nu. Walhmglon. n. a

.. UNITED STATES PATENT OFFICE.

WOOLLEY LOCOMOTIVE ELECTRIC PLACE.

HEADLIGHT COMPANY, OF SAME ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 319,539, dated June 9, 1885'.

Application filed May 16, 1884.

To all whom it may concern.-

Be it known that I, LEONIDAS G. WooLLEY', of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Electric Lamps, of which the following is a specification.

The object of my present invention is to provide an improved means of taking up jolts or jars on electric lamps, and thus counteracting the effect thereof on the mechanism which controls the movement of the carbons. As is well known to those skilled in the art, any jolting or jarring of an electric lamp will, by causing an irregular movement of the carbons, thus varying the length of the arc, seriously affect the light and render the lamp practically useless. It has therefore been impracticable to use the ordinarily-constructed lamps in many places Where their use would otherwise be very desirable. One of these places is on locomotives, as an electric head-light, and my present invention is particularly designed for this use.

My invention consists in interposing between the frame on which the mechanism for governing the movement of the carbons is mounted and the dash-pot a lever, by which the movement of the piston of the dash-pot is multiplied, and thus rendered more effective, as will be presently more fully described.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is an elevation of a lamp embodying my invention; Fig. 2, a central vertical section,on an enlarged scale, through the middle portion of the same, the ordinary clock-work governing mechanism being omitted Fig. 3, a horizontal sectional view, looking downwardly from the dotted line a z; and Fig. 4, a detail section, on the same scale as Fig. 1, on the dotted line y y in Fig. 2.

In said drawings, the portions marked A represent the supporting frame-work of the lamp 5 B, the pivoted frame on which the governing mechanism is mounted; G, the dash- (No model.)

pot; D, alever; E, the solenoids, and F F the carbons.

In most particulars the lamp shown is an old and well-known construction, the principal feature of the present invention consisting in the arrangement of the parts connect ing the pivoted frame B to the plunger of the 5 5 dash-pot O, as before described, and therefore the description will be limited to said novel parts, and such incidental description of the other parts as may seem necessary to properly illustrate the operation of the invention. The frame B is pivoted to the frame A by pivots a, and has the bar E (connected to the cores 6 of the solenoids) pivoted thereto by pivots b. It is connected to the short end of the lever D by a connecting-rod, B. dash-pot G is shown as mounted on top of the frame-work A by means of a pivot, c, on the side opposite the end of the pivot-frame B, which is connected to the piston O of said dash-pot. chamber, but may be filled with liquid, if desired. The general construction is simple and easily understood. The leverD is pivoted on a standard, D, and has one end con- The Its chamber is preferably an airnected to the piston O of the dash-pot, and 7 5 the other end connected to the end of the pivoted frame B by means of the connecting-rod B. The fulcrum D of said lever is located much nearer the end which is connected to the frame B than to that which is connected to the piston O, and thus, as will be readily understood, any slight movement of the frame will cause a long stroke of the piston, which operates to compress the air in the chamber, and

thus affords a cushion or resistance to the S enabled to resist the effects of such jars or jolts and hold the carbons in their proper position, thereby maintaining the steadiness of the light, notwithstanding the rough usage to which the lamp may be subjected. The solenoids E are preferably of the variety known 5 as differential solenoids, but may be of any suitable construction. They are shown double, with a bar or yoke, E, connecting their cores 6, and also connecting said cores to the frame B, through which they operate on the governing mechanism in the ordinary and wellknown manner.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric lamp, the combination, with the pivoted frame carrying the governing mechanism and the dash-pot, of a lever, one end of said lever being connected to the piston of said dash-pot, and the other end being connected to said pivoted frame, its fulcrum being located nearest the end which is connected to the frame.

LEONIDAS G. WOOLLEY. [L. s.]

Witnesses:

G. BRADFORD, CHAS. L. THURBER. 

